GPOWER F-50R User manual

FOUR-STROKE GASOLINE ENGINE
15mm
O10mm
O5mm
80mm
76mm
127mm
129mm
=55mm
.
.
Displacement : 49.87cc
Practical rpm : 1200~7000rpm
Suggested Props : 20~21X10
20X10=6800rpm
.
.
Gasoline/Oil Mix : 20:1
Specifications :
Weight : 1500g
Operating Instructions
WWW.GAUIGPOWER.COM
100% CNC ENGINE BLOCK
HAND ASSEMBLED
100% CNC ENGINE BLOCK
HAND ASSEMBLED

H
High Speed Needle
Low Speed Needle L
1.Engine assembly.
H=1 2
1+2
1
L=1 2
1+2
1
2.Valve clearance adjustment
The valve clearance should be checked and adjusted after 2 hours of break-in and again after 5 hours.
0< t <0.1mm
3.Recommended Fuel
The factory recommended fuel is high octane (premium) pump gasoline. Av-Gas is not recommended.
4.The carburetor adjustment
5. Ignition system
Please refer to the ignition system manual.
6.Propeller Installation.
The recommend prop size is 20x10 or 21x10. The propeller must be attached with six 4mm bolts.
8< L <14mm
Tighten the exhaust header locking nut by
Loosen the valve rocker adjustment nut
a. Remove the spark plug and rocker arm cover.
b. Adjust the valve clearance.
C. After the gap is checked and adjusted,
* The gap should be between 0mm and 0.1mm (.004”).
a.To drill the prop holes, fix the prop washer
b.Drill holes with 4.1mm, .1614”,
*Prop thickness will be vary by type and brand.
Prop hub thread depth:
tapping the wrench/spanner with a small hammer.
After that, they should only need occasion inspection and adjustment.
Turn the crankshaft until the piston is at Top
Dead Center.
tighten the lock nut securely.
The gap should never exceed 0.1mm (.004”)
Mix the gasoline with high quality 2 stroke oil at a ratio of 20:1.
For example: 1 liter of gasoline mixed with 50c.c 2-stroke engine oil, or 1 gallon of gasoline mixed with 6.4 oz. of 2 stroke oil.
The threads of these 4mm bolts must screw in at least 8mm deep into the hub.
on the prop temporarily with a small amount
of CA glue.
or #20 drill.
14mm (.55”)
Please use the correct screw length to
insure ample thread engagement in the prop hub.

7.Installation of the engine
While breaking in the engine, we recommend running the engine on your plane or a test stand with ample shock absorption.
Warning
a.Please read the instructions carefully.
b.Always protect yourself by using gloves and safety glasses when starting the engine.
c.Be careful of the spark plug pulse! It is in excess of 20,000 volts.
d.When operating the motor, never stand, or allow anyone else to stand, in front of, or to the side of the propeller.
8.
Maintenance and Repair
Should you ever need to repair your GPOWER engine, genuine spare parts are available through your
GPOWER dealer. Do not disassemble the engine unless you have the necessary skills, practice and tools.
Please note that any disassembly by unauthorized persons will void the manufacturer’s warranty.
Warranty
GPOWER engines carry a two year manufacturer’s warranty. In case your GPOWER engine needs a repair in
the warranty period, return the engine in its original packing, along with a proof of purchase, to your
dealer or send it directly to the manufacturer. Please include a description of the problem and include
all details about the fuel, propeller and glow plug used.
Please note that the warranty will be void if any unauthorized disassembly has taken place.
Furthermore the warranty explicitly excludes coverage of all damages caused by corrosion,
overheating and crashes.
Serious damage can occur to the engine due to vibration frequency with a rigid test stand. We prefer to fly the engine
while it breaks in as it is easier and cooler for the engine compared to ground or bench running.
Always stand behind the propeller.
e.Do not operate the motor if you do not want to be completely responsible for any damage or injury incurred or
f.Keep away from the prop while operating the motor. Do not wear loose clothing near the motor or prop.
g.Do not run the motor near loose material such as dirt, gravel, power cords, ropes, sand, etc.
h.Check that the propeller bolts are tight before every flight.
caused during its operation.
Loose material can be drawn into the turning prop causing injury or damage.
i.Always install and use an ignition kill switch to stop the motor.
j.Adjust the carburetor linkage so that the motor will stop when the carburetor is completely closed.
k.If you have any questions about any aspect of operating this motor, do not attempt to start or operate it.
l.Never operate the motor, or fly, alone
This motor could stop at any time, for variety of reasons. Do not fly your plane if
you couldn’t land it safely when the motor stops.

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1850511 Rock Cover
No. Code No. Description
2850512 Rock Arm (1set.)
3850513 Valve Spring Retainer Assembly (2set.)
4850514 Valve Spring (2pc.)
5850515 Rocker Cover Gasket
6850516 Rocker Base
7850517 Rocker Support
8850518 Cylinder Head
9850519 Heatsink
10 850520 Valve (1pc.)
11 850521 Head Gasket
12 850522 Cylinder
13 850523 Push Rod (2pc.)
14 850524 Push Rod Cover (2pc.)
15 850525 Rubber Seal (4pc.)
16 850526 Cam Follower (2pc.)
17 850527 Cam Follower Cover (Intake)
18 850528 Cam Follower Cover (Exhaust)
19 850529 Cam Cover Assembly (1pc.)
20 850530 Camshaht Bearing
21 850531 “O”Ring/S (2pc.)
22 850532 Camshaft
23 850533
Breather Nipple (2pc.)
24 850534 Crankshaft Ball Bearing (Front)
25 850535 Taper Collet
26 850536 Drive Hub
27 850537 Main Shaft Washer
28 850538 Main Shaft Screw
29 850539 Propeller Washer
30 850540 Crankcase
31 850541 “O”Ring/M
32 850542 Crankshaft Ball Bearing (Rear)
33 850543 Crankshaft
34 850544 “O”Ring/L
35 850545 Cover Plate
36 850546 Connecting Rod
37 850547 Piston Pin Gasket
38 850548 Piston
39 850549 Piston Ring
40 850550 Piston Pin
41 850551 Piston Pin Retainer (2pc.)
42 850552 Engine Mount
43 850553 Exhaust Piper (100 ) W/44X2pc.
44 850554 M16X1 Lock Nut (2pc.)
45 850555 Washer (16mm)
46 850556 Intake Piper (90 ) W/44X2pc.
47 850557 Intake Manifold
O
O
48 850558 Intake Manifold Gasket
49 850559 Carburetor Complete
50 850560 Velocity Stack
51 850561 Muffler
No. Code No. Description
M3X6 (10pc.) 850661A-
B-
C-
D-
E-
F-
G-
H-
I-
J-
M4X20 (10pc.) 850662
3mm”E”Rings (10pc.) 850663
M3X6 (10pc.) 850664
M4X16 (10pc.) 850665
Screw Pin (1pc.) 850666
M3X3 (10pc.) 850667
M5X40 ( 2pc.) 850669
M4X16 (10pc.) 850670
M4X32 (10pc.) 850668
Code No.
No.
Screws should be applied
with thread lock !!!
51